Illuminated dial



w. c. BUcHHoLz ET M v luly 3, 1928.

ILLUMINATED DIAL VOrignalFiled May 19, 1925,

INVENTOR VLLJAM @Buch/HOLL {QANKUCHP/@Lz mmq/,I

" ATTORNEYS WIT ESSES Reimeduuly 3, 192s.

UNITED Asrnras l Re. 17,011v PATENT-f OFFICE.

WILLIAM C. BUGHHOLZ AND FRANK .BUCHHOLL 0F BROOKLYN, NEW YORK..

ILLUMINATED DIAL.

Original No.`1,566,069, iated December 15, .1925,.Seria1 No. 31,368, led May 1K9, 1925. Application for reissue 111ml 0ctober 4, 1926. Serial No. 139,540.

rI"his invention relates to dials and particu larly to an improved illuminated dial for use on radio apparatus, an object being to provide a construction which maybe readily applied tothe cabinet otra radio apparatus and connected up to the various parts thereof without re-arranging any of the parts.

Another object of the invention is to provi de an illuminated dial for radio apparatus.

wherein the dial may be illuminated for a short or long time without illuminating to 4any appreciable extent the surrounding objects. I y

A further object of the invention is to provide an illuminated dial wherein the parts are so arranged that the illuminated lamp is hooded by an object adjacent the dial and particularly by the adjusting knob.

A still further object of the inventionis to provide an illuminated dial in connection i `with a supporting plate and an adjusting knob, the parts being so arranged that the entire assemblage may be applied and removed at any time. i

In the accompanying drawing- Figure 1 is a sectional view through Figure 2 on line 1--1. the same disclosing an vembodiment of the invention.

Figure 2 is a sectionall view through Fig- 3" 'ure 1 on line 2--2, said ligure illustrating the details of an illuminated dial disclosing the invention.

Figure 3 is a detail perspective view oa clipl embodying certain features of the invention.

Referring to the accompanying drawing by numerals, 1 indicates the panel of a radio i apparatus` as for instance, an ordinary receiving set. In properly adjusting or tuning the set, it is necessary to provide dials and adjusting means therefor. In many cases,

-the radio apparatus is placed where the light is-not good, particularly towards evening,

and, consequently, means must be provided for securing light so that the dials may be seen in order tosecure the desired adjustment. In the present invention, means have been provided which will readily illuminate 4 that part of the dial to be examined without illuminating much of the surrounding space or articles.- The invention further contemplates the use ofa dial hidden from View `with the exception of a small part thereof,

as well as a hooded lamp.

As illustrated in the drawing, the 'panel 1 is provided with bores 2, 3 and 4, bores 2 and 4 receiving the inwardly extending hollow studs 5 and 6 which are preferably integral with the plate 7. The plate 7 is preferably made from rubber., vbakelite or other material which may have the same .appearance as panel 1. In forming the pla-te 7, a socket 8 is formed thereon preferably integral therewith. This socket is provided with a metal threaded lining 9 and acentral Contact 10, said lining land contact co-acting with the threaded sleeve 11 on the lamp 12 and the central contact 13 on the lamp 12. The post 5 is providedl with a metal bushing or sleeve 111 which snugly ts the same,said bushing or sleeve being connected by a suitable wire 16 to one of the terminals in the socket 8 while the opposite terminal in socket 8 is connected by wire 17 to the metal bushing 18, sai-d metal bushing being arranged in the hollow post 5 and held in place by any desired means, as lfor instance, friction. The

metal contact plug 19 is also arranged in the post 5 and ,co-acts with a threaded member 20 for closing the circuit. It will be noted that the sleeve 14 is connected to a suitable source of current by wire 21 and vbe lighted,screw 20 is rotated manually until the same contacts with the plug 19 where- .upon the circuit of the lamp will be closed and it will burn until the circuit has been opened which may be done by reversing the action of screw 20. The lamp 12 1s pos1- tioned within the hollow part of the knob 23 whereby it is hooded but is permitted to illuminate the window 24 and surrounding objects as well as that part of-l the dial 25 which' may be seen through the window. Dial 25 is provided with suitable aduations for indicating the relative posltion of the parts. The dial 25 ris rigidly connected in any desiredvmanner with a hollow shaft 26 provided with a number of slits 27 and with a tapering section 28'adapte`d to be `engaged by the tapering section- 29 of the l sleeve to telescope over the shaft 26 and as the bevel surface 28 moves over the taper ing portion 29, the various sections or parts of the shaft 26 between the slits 27 will gradually move in or collapse and thereby pinch tightly the shaft 33 which-is connected to the instrument within the radio apparatus which 'is to be adjusted, as for instance, a variable condenser. The dial 25 is preferably provided with teeth 34 with which the small pinion 35 meshes, said pinion being rigidly connected to a knob 36 in any desired manner whereby when said knob is rotated the dial may be rotated. In order to hold the late 7 and associated parts properly on e (panel 2, resilient clips 37 are provided, sai clips being substantially U-shaped as shown in Figure 3 and provided with bowed up portions 38 and 39. These bowed up portions are adapted to fit into the grooves 40 of the respective members 5 and 6. It will be seen from the drawing that the dial 25 is completely hldden except for that part seen through the window 24. A lamp is provided for illuminating that part. of the dial exposed through the window 24 and in order that the light will not shine into the eyes of the observer, a suitable hood is provided. To illustrate one embodiment of the invention, the knob 231 has been formed as a hood and covers the lamp suliicien-tly to. presentv an ecient hood.

What we claim is:

1. An illuminated dial, .comprising .a plate, means for mounting the plate, a rotatable disk formed with graduations acting as a ydial member, said plate being formed with a window for exposing to view part of said plateand the graduations thereon, a

- lamp carried by saidrplate for illuminating said window and the surrounding parts, and a knob extending through said plate car ing said disk, said knob being substantial y hollowand open on one face, the knob bein so positioned as to act as a hood forsai lamp. 1

2, Thel .combination with a radio appa-ratus having ashaft extendingthrough the front panel, of a plate connected to said panel and provided with an opening through which said shaft extends, a hollow shaft surroundin the rst mentioned shaft,.said hollow sha t being collapsible so as to pinch said first mentioned shaft, means for collapsing said hollow shaft, a knob' connected with said hollow shaft and acting as a han' dle therefor and also as a hood, a lamp carried b said plate projecting into said knob, said amp being positioned to illuminate part of said plate, said yplate being formed with a window positioned to be illuminated by said lamp, a dial plate secured to said v-hollow shaft and formed with graduations adapted to move past said Window as the dial plate is rotated, and a manually actuated switch for said lamp for opening and closing the circuit' thereof.

3. The combination with a radio-apparatus formed with a panel and a shaft extending through the panel, of a plate removably connected to said panel, an .actuating member for said shaft, said actuating member including a hollow knob open on the side facing the plate, said plate being formed with an electrical socket, a lamp mounted in said socket and projecting to a osition within said knob but arranged to illuminate part of the plate, said plate being formed with a window at the point illuminated by said lamp, a dial connected with said knob, said dial being formed with graduations adapted to be moved past said window, and a manually actuated switch for opening vand closing the circuit of said lamp. n

'4. The combination with a radio apparatus provided with a dial, of means includingwith an overhanging apron adapte to overhangy said lamp so as tohood the same.

tus provided with a dial, of means acting as a cover for sald dial except at one portion, means including an electric lamp for illuminating the exposed portion of said dial, and

a knob for actuating1 said dial, said knob covering part of sai y lamp..

yWILLIAM o'uoHHoLz.

FRANK BUoHHoLz.

-10o 6. The combination with a radio appara 

